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PHP insteadof 关键字
tryphp_keyword_insteadof
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<!DOCTYPE html> <html> <body> <?php trait message1 { public function msgA() { echo "My favorite color is red. "; } public function msgB() { echo "My favorite number is 5. "; } } trait message2 { public function msgA() { echo "My favorite color is blue. "; } public function msgB() { echo "My favorite number is 7. "; } } class MyClass { use message1, message2 { message1::msgA insteadof message2; message2::msgB insteadof message1; } } $obj = new MyClass(); $obj->msgA(); $obj->msgB(); ?> </body> </html>